UX Workflow improvements for Physics Materials (#1237)

- Added button to PhysX Collider Component in PhysX Mesh's field to open FBX Settings.
- Added button Material Selection to open the physics material library in Asset Editor.
- Default Material in PhysX configuration is read only and consistent with the text in combo boxes.
- Material configuration field "Surface Type" renamed to "Name"
- Fixed bug in EditorColliderComponent where the material selection was not updated when changing the library.
- Fixed bug where the materials selection was not set to default when a physics material from the asset was not found in the library.
- Added attributes 'BrowseButtonEnabled' and 'BrowseButtonVisible' to PropertyAssetCtrl.
- Updated physx configuration setreg files of AutomatedTesting project.

Gems/PhysX/Code/Tests/PhysXSceneQueryTests.cpp

@@ -172,7 +172,7 @@ namespace PhysX
         ASSERT_EQ(hit.m_material, rigidBody->GetShape(0).get()->GetMaterial().get());
 
         const AZStd::string& typeName = hit.m_material->GetSurfaceTypeName();
-        ASSERT_EQ(typeName, AZStd::string("Default"));
+        ASSERT_EQ(typeName, Physics::DefaultPhysicsMaterialLabel);
     }
 
     TEST_F(PhysXSceneQueryFixture, RayCast_AgainstStaticObject_ReturnsHit)